Miscellaneous - High Efficiency Filters

High Efficiency Filters

When EXTREMELY high efficiency filtration is required, N. R. Murphy Ltd. can supply you with absolute (H.E.P.A.) filters that are over 99.97% efficient for microns as small as 0.3 and approaching 99.97% below 0.3 micron size.

These filters are available in various sizes and can be used individually or in series, depending on the required C.F.M. to be filtered.

In most installations, intermediate or high efficiency prefilters are required upstream of the absolute filter to keep them relatively free from dust and to extend the life of the absolute filter. The prefilters can also be used alone, without the absolute filter, but efficiency would drop to approximately 95% on 0.3 micron size.

Holding frames and side entrance housings are available, completely factory assembled with flanges for easy attachment to ductwork.

Typical applications for this type of filtering would be in the chemical industry, precision assembly areas and other instances where an extremely clean environment is required.

The most common size filter is approximately 24" square, ranging in depth from 7" to 12 1/2" with air flow capacities from 200 C.F.M. to 2000 C.F.M. per filter.

Click here for Relative Size Chart of Common Air Contaminants.

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